package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.fasterxml.jackson.core.PrettyPrinter;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

//    @Autowired
//    private StringRedisTemplate redisTemplate;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set<String> keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功 ");
    }

    /**
     * 菜品分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){

        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();

        //添加条件
        lambdaQueryWrapper.like(name != null, Dish::getName, name);

        //添加排序条件
        lambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);

        dishService.page(pageInfo, lambdaQueryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());


        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }


    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }

    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set<String> keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功 ");
    }


    /**
     * 根据id数组对批量操作dish表单中的状态
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> stopSell(@PathVariable int status, Long[] ids){
        log.info("status: {}, Long[]: {}", status, ids);

        if (ids.length > 0){

            for (int i = 0; i < ids.length; i++) {
                Dish dish = dishService.getById(ids[i]);
                dish.setStatus(status);
                dishService.updateById(dish);
            }

            return R.success("状态修改成功");
        }

        return R.error("批量操作，请先勾选操作菜品！");
    }

    /**
     * 根据id数组，批量从dish表
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(Long[] ids){
        log.info("ids[]: {}", ids);

        for (Long id : ids) {
            dishService.removeById(id);
        }

        return R.success("删除成功！");
    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
//        //添加条件，只查询状态为1的
//        queryWrapper.eq(Dish::getStatus, 1);
//        //添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//
//        List<Dish> list = dishService.list(queryWrapper);
//
//        return R.success(list);
//    }

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){

        List<DishDto> dishDtoList = null;

        //动态的构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1535145562572572457_1

        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        //如果存在，直接返回，无需查询数据库
        if (dishDtoList != null){
            R.success(dishDtoList);
        }


        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，只查询状态为1的
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);



        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            //SQL:
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);

            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到redis
        redisTemplate.opsForValue().set(key, dishDtoList);


        return R.success(dishDtoList);
    }

}
